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There are around 5 billion red blood cells per ml of blood, and 4 to 11 million white blood cells per ml.

• frozenport 10y ago
  Typically blood smears contain a much smaller number (100s).
  • imaginenore 10y ago
    We're talking multiple drops of blood from the finger. An average drop is around 50 microliters. There's absolutely no way you end up with just hundreds of cells.
    • frozenport 10y ago
      Except that's that's what I see when I make a buffy coated slide. There are even protocols when you get too few cells, see https://www.google.com/url?q=http://www.austincc.edu/mlt/hem/hem_Lab_Counting%2520to%2520100_Fa15.doc&sa=U&ved=0ahUKEwjWsKvIodXMAhWCbj4KHdJmDo8QFggPMAE&usg=AFQjCNERR97lteYekmEaVNEo85f0LcuLUg https://www.google.com/url?q=http://www.austincc.edu/mlt/hem...